High-efficiency, High-capacity Switching DC Power Supply (CV/CC)PAT-T Series

Environmentally conscious, energy-saving, high-capacity power supply

The PAT-T Series is a constant voltage/constant current, auto-shifting, switching DC power supply.It features a soft switching system that offers greater efficiency and lower noise. At the same time, it makes full use of high-density packaging technology to reduce the unit’s size and weight.The chassis is the standard rack width(430 mm), and is about 130 mm(3U) high and 550 mm deep. The output power is 8 kW.Compared to series regulated products of the same capacity, it is about 1/6 the volume and 1/7 the weight.While offering a high output of 8 kW despite its small cabinet size, it also features a “power factor correction circuit.” With a high power factor of 0.95, it improves the power environment (suppresses harmonic currents) and also greatly contributes to “energy saving,” as exemplified by its simplified and miniaturized power reception and distribution modules, and overall lower power consumption.Furthermore, an optimized heat radiation design will make operation guaranteed at ambient temperatures of up to 50 ˚C. It can thus be deployed in demanding applications where it must provide full-load, continuous operation despite high ambient temperatures. The layout of the operation/display panel is simple and intuitive and has been designed with viewability and usability in mind. An RS232C interface is provided as standard together with external analog control, monitor output, and status output connectors, enabling control from an external computer or sequencer.In addition, GPIB, USB, or LAN interface can be equipped as a factory option. The unit can either be used in a standalone configuration or can be incorporated into a test system.

Features

Save precious testing laboratory space!

[Size comparison]
Comparison between PAT-T (8 kW) and previous Kikusui product (7 kW)

Optional vertical stand!

Optional vertical stand for easy transportation and table side operation. Compatible with all PAT-T series models. Caster- equipped frame and handle kit included./p>

*PAT-T series main unit is not included.

Soft switching system

The PAT-T power supply circuit system skillfully utilizes resonance when executing power device switching when the voltage or current is at zero. This allows the unit to operate without switching loss or transient crossover of voltage and current. Switching that occurs at 0V is known as “zero voltage switching” (ZVS), while switching at zero current is referred to as “zero current switching” (ZCS). With conventional power supply circuits, problems such as increased power loss and diminishing efficiency occur when switching speed increases. However, a soft-switching system utilizes highly efficient power supply circuits that reduce heat loss and allow for for smaller circuitry, resulting in compact chassis size as well as minimal noise generation.

Power factor correction circuit

The power factor (PF) values indicates the efficiency of an AC circuit, referring to the ratio of effective power to apparent power. The closer the power factor is to 1, the more efficient the equipment (circuit) is in its electrical power usage. Incorporating a power factor correction circuit corrects AC voltage and current phase differences (waveform deviations causing reactive power), improving electrical power efficiency. Specific advantages include the following:

Increased energy efficiency.
Downsizing of power reception and distribution modules.
Improved power supply environment.
Reduces transmission loss.
Vastly reduces noise emissions.

Parallel operation up to five units of the same model!

Up to five units (two units for PAT850-9.4T, PAT1000-8T and PAT1500-5.3T) can be configured in a master-slave parallel connection. This allows you to control the whole system via the master unit front panel with full display of the current sum (max. output current: rated output current of single unit x number of parallel units). Furthermore, the output current of each slave unit can be monitored by pressing the STORE button of each slave unit*. For parallel connection, parallel operation cable PC01-PAT is required for each slave units.

*Not available with 8 kW-type 400 V input models (20 V, 40 V, 60 V, and 160 V types) and 4 kW types.

Series operation up to two units of the same model!

Up to two units can be connected in series for 8 kW (PAT20- 400T, PAT30-266T, PAT40-200T, PAT60-133T, PAT80-100T, and PAT160-50T) and 4 kW types. However, master-slave operation is not supported. The sum of the output voltage between the two units is supplied to the load.

4 kW types operable with single-phase 200 V input.

The current is limited to approximately 75% of the rated value with a power limit of 3 kW.

CV, CC priority starting function*

The PAT-T can be set to start up as either a constant voltage (CV) power supply or constant current (CC) power supply when the output is turned ON. CV priority mode is used during constant voltage, while CC priority mode is used during constant current for smooth startup without overshoot.

Output current rise waveform comparison during constant current operation

*Not available with 8 kW-type 400 V input models (20 V, 40 V, 60 V, and 160 V types) and 4 kW types.

External analog control function

Output voltage can be controlled by an external voltage (Vext) of 0 V to 10 V or an external resistance (Rext) of 0 kΩ to 10 kΩ. FAST mode* allows for direct control of external voltage (without passing through CPU), removing any delay between Vext and changes in output voltage.

Other functions

RS232C standard digital interface
USB/GPIB/LAN optional digital interfaces
Reliable output ON/OFF delay function for sequence output
Memory function (three sets of voltage/current)
Voltage/current monitor output
Status signal output
Remote sensing function
Protection functions
Protections against shutdown, overvoltage, overcurrent, overheating, input phase interruption, fan malfunction, sensing, and bleeder circuit overheating available
High noise resistance(for reassurance during car electronics testing)
Easy maintenance with quick fan replacement

Smart Rack System (PAT-TX/TMX)

Maximum output of 40kW, 2000A!

This high-current model consists of multiple PAT-T Series units configured in a special cabinet rack.

High power: 16kW to 40kW, 4 types
Built-in power factor correction (PFC) circuit for harmonic current control and energy efficiency!
Optional built-in circuit breaker (“X” models)
3-Phase 200V and 3-Phase 400V input specifications available
RS232C standard digital interface. USB, GPIB, and LAN (LXI) available as factory options.
Lineup: 164 models in total (82 models in table below are 3-phase 200V input type)

Applications

Output voltage lineup ranging from 20V to 1500V. Highly versatile power supply for a wide range of tests and evaluations.

Car electronics applications

Solar Power Generation

V2H/L EV Simulator

There is always the risk of breakdown or failure to comply with various charging standards (CHAdeMO, Combo, GB, etc.) when using an actual EV in quick charger and V2H/L power conditioner R and D testing. Using an EV simulator makes it possible to closely evaluate charging devices in accordance with various charging standards without requiring an actual vehicle.

DC-DC Converter Evaluation Test System

By utilizing a combination of programmable DC power supplies , electronic loads, and dedicated application software, performance tests for automotive DC-DC converters has never been easier.

Power Semiconductor Evaluation System

Temperature changes caused by rapid increases in current are often measured in transient thermal tests for semiconductors. Utilizing the PAT-T series DC power supply and PLZ-5WH series electronic load, rapid changes in current from a few hundred A to several thousands A can easily be realized in a matter of milliseconds.

Battery Evaluation Test

Although high-speed operation cannot be achieved using only the PAT-T high-capacity switching power supply, the fast-response unipolar power supply system can be suplemented by connecting with the PLZ-5W series electronic load in series and parallel. This makes it possible to flow current while synchronizing the charge and discharge current patterns for a battery at high speeds.

Fuse Rupture Test

For fuse rupture tests, DC power supplies with high speed CC control is absolutely vital. Although it is normally quite difficult to achieve such high speed control with only a DC power supply, the addition of a PLZ-5W electronic load makes high speed current control possible. With the PLZ-5W, fuse rupture tests that adhering to standards such as the JASO D612 are made possible. These tests include voltage drop tests, transient current cut-off tests, rupture time tests, step energization tests, and breaker capacity tests.

Current Sensor Evaluation

Accurate current sensor evaluation possible when combined with a high-precision CC DC power supply. Additionally, 3-level range settings allow you to select your desired current setting resolution in accordance with your test requirements.